Wilhelm uehfdeboth



V no Model.)

w. LENDEROTH.

UNDERGROUND TUBE FOR TELEGRAPH WIRES.

No. 284,643. Patented Sept. 11, 1883 VVi'hz asses:

UNITED STATES XVILHELM LENDEROTH,

PATENT OFFICE.

OF NEV YORK, N. Y.

UNDERGROUND TUBE FOR TELEGRAPH-WIRES.

SPECIFICATION forming part of Letters Patent No. 284,643, dated Eeptember 11, 1883,

Application filed February 7, 1881 (No model.)

To QLZZ whom it may concern.-

Be it known that I, XVILHELM LENDEROTH, of New York, in the county and State of New York, have invented an Improved Under ground Tube for Telegraphires, of which the following is a specification.

Figure 1 is a crosssection of my improved undergrouml tube for telegraphwires, and Fig. 2 a longitudinal section of the same.

The object of this invention is to produce a subterranean, receptacle for telegraph wires, cables, and the like, in which the several wires or cables are completely separated and insulated from one another and separately sustained in position, and in which, moreover, access can readily be had to any particular one or more wires to be reached.

The invention consists, first, in making the walls of the sectional tube (that is to say, of the tube which is longitudinally divided, so as to furnish a cover) with longitudinal chan nels or grooves, in which the wires can be placed, said grooves extending; slightly upward, so to provide for the slack of the wire while the same is being inserted, and for subsequent stretching.

The invention also consists in supplying the tube thus constructed with an inner projection or projections having similar grooves or cavities for receiving similar wires; also, in combining this grooved structure with wedgelike retaining-blocks, by which the wires are locked into their respective cavities.

In the accompanying drawings, the letter A represents the lower portion, and B the upper portion, of the tube or subterranean wire-carrier. These two portions A and B are longitudinally separated, as indicated in Fig. 1, and the joints between them are made tight by a suitable packing, a,-so as to exclude water and noxious gases from the interior of the pipe, and yet the cover B can be readily taken oil, when desired, to give access to the interior of the lower part, A. In laying this tube the covers and lower parts should, by preference, break joints, and where the joints are in the lower part they may be closed by a supporting saddle-piece, G, which is clearly shown in Fig. 2, or in any other suitable manner. The interior of the lower portion, A, of the tube has formed in. its walls series of cavities or grooves 11, that extend longitudinally therein, as shown; but at the ends of each section A the grooves are omitted, or, rather, the spaces between the grooves, so as to leave blank spaces (1, (see Fig. 2,) for greater facility in taking hold of the wires whenever the junction of two sections, A A, is laid bare. Into the grooves Z) Z) are placed the telegraph-wires O, and in them said wires are properly supported, sepa rated, and insulated from one another. Of course the pipe A is made of proper insulating materialsuch as clayand for greater certainty the inner faces of the grooved portions Z) should be glazed or porcelainlined. lVhere a larger number of wires are to be accommodated, the section A supports one or more longitudinal ribs, D, each having grooves b on its opposite sides, as shown in Fig. 1, so as thus to produce a larger number of receptacles for the wires 0. Some of these receptacles may be made larger, others smaller, according to the size of wires to be placed into these tubes. The space left between the side walls of the tube, and any one of the projections D, may also be used as a receptacle for large cables, as indicated at E in Fig. 1. After all the wires have been placed in their respective grooves they an be locked in place. by wedgelike blocks F, that are inserted in the tube at suitable distances apart, and that reach from one series of channels or grooves, Z), to the opposite row of such channels or grooves, as is clearly indicated in the drawings.

It can be seen that with this structure tele graph-wires, telephone-wires, and the like can be quickly laid. One person can readily lay forty or fifty wires in a tube and properly space them, and when they are spaced the wedges or blocks F are inserted to lock them in position.

The cavities I) extend slightly upward, as shown, so that when the wires are stretched they will be in the upper parts of said cavities, and not rest in the lower. This will protect them against any possible moisture that may settle in the cavities, and adds to the convenience of inserting the wires in the tube.

lVhenevcr repairs are needed they can easily be effected by opening that portion of the tube where the operation is to take place, taking out the proper wedge or block F, and picking from its groove the particular wire desired without at all interfering with the others.

The invention described shows that with its assistance it will be possible to lay telephonewires, electric-light wires, telegraph-wires, &c., separately in the earth, all insulated one from the other, and yet all contained in the same tubing.

I claim- 1. The tube A B for telegraph-wires and the like, said tube having grooves I) along its walls, 011 the inner side, which grooves constitute receptacles for the wires, substantially as specified.

2. The tube A B, made with channels I) in its walls, said channels extending outward 'WILHELM LENDEROTH.

Witnesses:

WILLIAM H. 0. SMITH, WILLY G. E. ScIIULTz. 

